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Sewer Line Air Pressure Test
The Sewer System - A Shared Responsibility 
It takes both homeowners and sewer agencies doing their part to keep the sewer system from overflowing into the environment. 
Sewer Pressure Test  
A Sewer Pressure Test is required to ensure there are no leaks or cracks in the sewer lateral between your home and the property line cleanout.  A leaking sewer lateral can cause inflow and infiltration into the sewer system, which causes increased pumping costs.   Groundwater in the system caused by leaking sewer laterals, mains and manholes can increase during a significant rain event and during the Spring melt season. 
When does a sewer pressure test need to be performed?   
- New construction 
- Addition of a toilet or living quarters 
- Change of use (e.g. residential to business or vice versa) 
- Repair/replacement of building sewer 
- Prior to close of escrow  
How is a sewer pressure test typically performed? 
  • The test section is from the building cleanout to the property line cleanout.  
  • An air test is performed by plugging each end of the lateral and applying 3.5 psi to the section under test. If the loss exceeds 1/2 psi in 5 minutes the test may be attempted one additional time. The second loss of pressure of more than 1/2 psi in 5 minutes constitutes failure.  
  • If the line fails, the owner is responsible for correcting the problem and scheduling a new test.   
  • The property owner is responsible for hiring a certified contractor to perform the test. 
For more information:   
Truckee Area
Tahoe City Area
Kings Beach Area
NorthStar Area
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